Mailman 3 March 2003 - Twisted

[Twisted-Python] PyRendezvous has been relicensed to LGPL(!)
by Bob Ippolito March 25, 2003

March 25, 2003

I saw on freshmeat today that PyRendezvous ( http://radio.weblogs.com/0105002/stories/2003/01/06/ multicastDnsServiceDiscoverForPython.html ) has been relicensed to LGPL, so maybe we don't have to write our own, at least not all of it. -bob

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[Twisted-Python] wanting more example progs for servers
by David McNab March 25, 2003

March 25, 2003

Hi, I'm just getting acquainted with Twisted. The examples provided are invaluable, at least the examples I can presently understand. But there's areas in Twisted that aren't covered by examples - eg IRCChatter. My initial attempts to write a basic IRC server using this protocol (based on simpleserver.py example) were unsuccessful. If one is an independent developer, and can't afford to pay for professional Twisted support, what's the best way to get across these protocol classes? Is it a … [View More]

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[Twisted-Python] Twisted, Windows, and Py2Exe
by Jeremy Noetzelman March 25, 2003

March 25, 2003

I'm trying to get a very simple application which uses Twisted to package properly via distutils+py2exe. It doesn't seem to work very well, and in fact complains about not being able to find a bunch of things (at the distutils point in the build process) The resulting executable doesn't run. And at this point, it's just a simple loop which does reactor.iterate(), and that's the extent of the Twisted code. W/o any Twisted code, everything works great. Has anyone used py2exe successfully … [View More]

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[Twisted-Python] Twisted https support?
by Mark Brady March 23, 2003

March 23, 2003

Hello, I am new to twisted and having a problem getting https support working. I can get the twisted webserver up and running and everything including woven works fine however the https option for mktap web just displays the list of mktap web options as if I had just typed 'mktap web --help' when I actually typed 'mktap web --https=8081'. The port and logfile options work fine. I am using activestate python 2.2.2 with twisted 1.0.3 on windows 2000 sp3. I have a self signed server.pem in … [View More]

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[Twisted-Python] PATCH: doc/howto/conch_client.html
by Lee Harr March 23, 2003

March 23, 2003

Hi; Found a typo in one of the examples... Also, I am getting an odd message from cvs at the end of the file... Not sure what to make of that. 9:14 >cvs diff -u conch_client.html Index: conch_client.html =================================================================== RCS file: /cvs/Twisted/doc/howto/conch_client.html,v retrieving revision 1.2 diff -u -r1.2 conch_client.html --- conch_client.html 18 Mar 2003 05:11:45 -0000 1.2 +++ conch_client.html 23 Mar 2003 14:18:30 -0000 @… [View More]

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[Twisted-Python] read timeouts ?
by Matthias Urlichs March 23, 2003

March 23, 2003

Hi, I have one rather large problem with using Twisted as a Web server (and in fact most other kinds of server), which is that there is no timeout. Thus, stale connections keep piling up, and sooner or later the open file limit is reached. :-( Suggestions as to where to place some time-out code are appreciated; I'm not that well-read in the Twisted internals. -- Matthias Urlichs | noris network AG | http://smurf.noris.de/ -- You can take all the impact that science … [View More]

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[Twisted-Python] Re: game server
by Lee Harr March 23, 2003

March 23, 2003

>I've been sporadically developing some code for a tic-tac-toe client and >server That's funny. I have one of those too... :o) http://www.nongnu.org/pygsear/ Look in the examples/twist_tac_toe/ directory in the distribution. _________________________________________________________________ The new MSN 8: smart spam protection and 2 months FREE* http://join.msn.com/?page=features/junkmail

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[Twisted-Python] game server
by Anthony Lim March 22, 2003

March 22, 2003

Hi: I am new to Twisted but after browsing the Twisted web site feels that it may be what I need. I am developing a game server for online multiplayer turn-based games like the one in http://games.yahoo.com <http://games.yahoo.com/> . Does anyone have any experience in applying Twisted in this area? Need all the advice I can get. I am looking at supporting 20K users with 10% online, and the possibility of scaling up to 200,000 users or more. Can Twisted be used for supporting … [View More]

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[Twisted-Python] game server
by Anthony March 22, 2003

March 22, 2003

Hi: I am new to Twisted but after browsing the Twisted web site feels that it may be what I need. I am developing a game server for online multiplayer turn-based games like the one in http://games.yahoo.com <http://games.yahoo.com/> . Does anyone have any experience in applying Twisted in this area? Need all the advice I can get. I am looking at supporting 20K users with 10% online, and the possibility of scaling up to 200,000 users or more. Can Twisted be used for supporting … [View More]

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[Twisted-Python] supporting start/stop/restart behavior
by Clark C. Evans March 21, 2003

March 21, 2003

First, before I get started, I'd like to say that I'm a new fan of twistd, it is quite nice tool, and I think everyone should use it. However, that being said, what it misses, IMHO, is a simple interface to stop and restart. Also, it lacks a nice way to be embedded within a python script so that the __main__ == __name__ hack runs the file properly. Anyway, what I'd like... is to take my arbitrary "test.py" file, let's say an application as simple as... from twisted.internet import app … [View More] from twisted.web.server import Site from twisted.web.static import File application = app.Application('test') application.listenTCP(8080, Site(File('.'))) And add these three lines of code to make it runnable... if '__main__' == __name__: from twisted.scripts.twistd import runDirect runDirect(save=1) In this way, the following commands 'just work': python test.py # runs the app directly (no daemon) python test.py start # runs the app as a deamon python test.py stop # stops the app as a deamon python test.py restart # restarts the app as a deamon And, even twistd options can be included... python test.py --quiet start python test.py --quiet What this involves is two things: 1. Refactoring runApp to remove a hunk of code which runs os.kill on a pid found in the given pidfile. This is moved to another function, killApp, which takes two arguments, config and signal. From the runApp the code then calls killApp(config, signal=0) 2. Adding a new function, runDirect which does several things: a. takes 'start', 'stop', and 'restart' as the last argument on the command line, if none of these are found, then the application is assumed to be run interactively (nodaemon); and b. it adds --python <filename> where filename is the name of the current python file (argv[0]), further, it gives a direct option in the function arguments to not save the tap file (saving a tap file is not always useful, and as an argument it is hard to miss); and c. if stop or restart are chosen, then this kills the current process using the given pidfile (which defaults to twistd.pid in the current directory) through killApp(signal=SIGTERM) d. unless stop is chosen, the app is then started using the configuration options as parsed (and modified via the --python option) This function could be broken into the start/stop/restart behavior from the --python option; but I don't have this requirement and people in the IRC list didn't seem to think that either of these two functions are useful. Anyway, I'm posting to this list beacuse I think the way in which twistd is used isn't obvious... i.e. the primary way you'd use it with a python source file is an option buried among many others. I raised this change on the IRC list, and the primary argument against the above was that it is out-of-scope; in other words, one could write a shell script to do the same. I think this is a bad argument beacuse _all_ of twistd could be done in a shell script. For example, if you ask D. J. Bernstein, he'd say that none of this deamon / logging behavior needs to be in an application, and this is why he has his 'daemontools'. So, the argument shouldn't be _can_ this be done externally, of course it can. The question is does it make sence to standardize on particular ways of using twisted so that everyone doesn't have their own approach, to logging, etc. I feel that this comes all the way down to Twisted having a simple way to start/stop/restart a server without having to rely upon external, non-Twisted scripts. At the very least, I'd like the killApp refactor to be accepted, as I'd rather not have to duplicate killApp code within a private/sandbox copy of runDirect. Best, Clark [View Less]

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